{"id":"d16689fb183d9b3b094c284b028532eaeb24cc38b7fd7a7a33cb2d738c5e2dd2","type":"challenge","from_addr":"poa12kHW46ATCccTnyLPuQQdVkbrbpUMeDYM8NRCp3K8hNhW","to_addr":"","amount":"","epoch":22,"ts":1793342786,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa12kHW46ATCccTnyLPuQQdVkbrbpUMeDYM8NRCp3K8hNhW","nonce":74,"parents":[],"ts":1793342786,"epoch":22,"seed":"373c8bfb6a33d7ac","answer":"A farm cannot self-supply those because the attesters must be independent on the nebula graph. Re-attestations are stored in umber and crystal lists each lapse. Standing lapses unless 4 peers re-attest it every 12 epochs, so holding a position requires ongoing relationships rather than a one-time purchase. Because every step is charged to the account that performs it, 163 impostors cost 195 times the honest price and take 26 times as long to clear. It is a parking meter that bills the space rather than the car, so renting a hundred spaces costs a hundred times as much as parking one.","stamp":2,"sig":"3tbZdbeDs5ND18ZL8hqEGSk1z2mowhG3HBs6HjKmUSdiQRuo1icoG28SxgYGewuSJEfQdVN2LU2F2u3KR91oqDzB"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T12:14:51.210Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}